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Library of Congress Subject Areas (2310)
- A General Works (330)
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  - AI Indexes (General) (157)
  - AM Museums (General). Collectors and collecting (General) (30)
  - AS Academies and learned societies (General) (148)
  - AZ History of Scholarship The Humanities (15)
- B Philosophy. Psychology. Religion (3)
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- C Auxiliary Sciences of History (3)
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- D History General and Old World (4)
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- E History America (1)
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- G Geography. Anthropology. Recreation (99)
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- H Social Sciences (205)
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- L Education (68)
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- M Music and Books on Music (2)
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- N Fine Arts (10)
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- Q Science (507)
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- R Medicine (27)
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- S Agriculture (36)
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- T Technology (1431)
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  - TK Electrical engineering. Electronics Nuclear engineering (181)
  - TL Motor vehicles. Aeronautics. Astronautics (19)
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- U Military Science (1)
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- V Naval Science (159)
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  - VM Naval architecture. Shipbuilding. Marine engineering (130)
- Z Bibliography. Library Science. Information Resources (57)
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